I have never really run P4 in classic mode but P4 is faster in 9 than P5 and P6 is .. P6 is better than P5 but it is still slower than P4 from what I have experienced. It does do more stuff though. I do like the OpenGL in P6. I can't stand PC's but there are a lot of things that seem to be worse (scrolling through libraries etc) but it does run a bit faster from what the old tests showed. I just could never buy one no matter what. I hate them that much.